| Message ID | 20191029182742.GC17569@mwanda (mailing list archive) |
|---|---|
| State | Mainlined |
| Commit | 89e551e83869732d5b9fd21d7cfdb1f8d62cf5d0 |
| Headers | show |
| Series | soc: samsung: exynos-asv: Potential NULL dereference in exynos_asv_update_opps() | expand |
On Tue, Oct 29, 2019 at 09:27:42PM +0300, Dan Carpenter wrote: > The dev_pm_opp_get_opp_table() returns error pointers if it's disabled > in the config and it returns NULL if there is an error. This code only > checks for error pointers so it could lead to an Oops inside the > dev_pm_opp_put_opp_table() function. > > Fixes: 5ea428595cc5 ("soc: samsung: Add Exynos Adaptive Supply Voltage driver") > Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> > --- > When we add a new driver, could we specify the which prefix will be used > going forward? In other words commit 5ea428595cc5 could have the > prefix "soc: samsung: exynos-asv: Add Exynos Adaptive Supply Voltage > driver". The "exynos-asv" bit was missing so the first person to send a > fix has to guess what is desired. Indeed, I usually do not add it on first commit to avoid duplication (prefix and later explanation) but I see that it would be helpful. Thanks, applied. Best regards, Krzysztof
diff --git a/drivers/soc/samsung/exynos-asv.c b/drivers/soc/samsung/exynos-asv.c index 8abf4dfaa5c5..30bb7b7cc769 100644 --- a/drivers/soc/samsung/exynos-asv.c +++ b/drivers/soc/samsung/exynos-asv.c @@ -93,7 +93,7 @@ static int exynos_asv_update_opps(struct exynos_asv *asv) continue; opp_table = dev_pm_opp_get_opp_table(cpu); - if (IS_ERR(opp_table)) + if (IS_ERR_OR_NULL(opp_table)) continue; if (!last_opp_table || opp_table != last_opp_table) {
The dev_pm_opp_get_opp_table() returns error pointers if it's disabled in the config and it returns NULL if there is an error. This code only checks for error pointers so it could lead to an Oops inside the dev_pm_opp_put_opp_table() function. Fixes: 5ea428595cc5 ("soc: samsung: Add Exynos Adaptive Supply Voltage driver") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> --- When we add a new driver, could we specify the which prefix will be used going forward? In other words commit 5ea428595cc5 could have the prefix "soc: samsung: exynos-asv: Add Exynos Adaptive Supply Voltage driver". The "exynos-asv" bit was missing so the first person to send a fix has to guess what is desired. drivers/soc/samsung/exynos-asv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)